Exhibit No. 12



COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES



The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines.



|                                                              |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|------------------------------------------------------------- |  | --------------------------------- | --- |  |  | --------------------------------- | - | ----------------------------------- |  | ----------------------------------- | --- | ----------------------------------- | - | --- | ----------------------------------- | - | --- |  |  | - | ---
|                                                              |  | Successor(1)                      |     |  |  | Predecessor(1)                   
|                                                              |  | Nine monthsendedDecember 31, 2006 |     |  |  | Three months ended March 31, 2006 |   | Twelve monthsendedDecember 31, 2005 |  | Twelve monthsendedDecember 31, 2004 |     | Twelve monthsendedDecember 31, 2003 |   |     | Twelve monthsendedDecember 31, 2002
|                                                              |  | (in millions)                    
|Earnings as defined for fixed charges calculation             |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Add:                                                          |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Pretax income from continuing operations                      |  | $                                 | 102 |  |  |                                   | $ | 186                                 |  | $                                   | 412 |                                     | $ | 378 |                                     | $ | 460 |  |  | $ | 406
|Fixed charges                                                 |  |                                   | 100 |  |  |                                   |   | 35                                  |  |                                     | 114 |                                     |   | 106 |                                     |   | 134 |  |  |   | 113
|Deduct:                                                       |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Interest capitalized(a)                                       |  |                                   | 14  |  |  |                                   |   | 3                                   |  |                                     | 7   |                                     |   | 5   |                                     |   | 9   |  |  |   | 8  
|                                                              |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Total earnings (as defined for the Fixed Charges calculation) |  | $                                 | 188 |  |  |                                   | $ | 218                                 |  | $                                   | 519 |                                     | $ | 479 |                                     | $ | 585 |  |  | $ | 511
|                                                              |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Fixed charges:                                                |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Interest on debt, including capitalized portions              |  | $                                 | 95  |  |  |                                   | $ | 33                                  |  | $                                   | 105 |                                     | $ | 95  |                                     | $ | 124 |  |  | $ | 104
|Estimate of interest within rental expense                    |  |                                   | 5   |  |  |                                   |   | 2                                   |  |                                     | 9   |                                     |   | 11  |                                     |   | 10  |  |  |   | 9  
|                                                              |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Total fixed charges                                           |  | $                                 | 100 |  |  |                                   | $ | 35                                  |  | $                                   | 114 |                                     | $ | 106 |                                     | $ | 134 |  |  | $ | 113
|                                                              |  |                                   |     |  |  |                                   |   |                                     |  |                                     |     |                                     |   |     |                                     |   |     |  |  |   |    
|Ratio of earnings to fixed charges                            |  |                                   | 1.9 |  |  |                                   |   | 6.2                                 |  |                                     | 4.6 |                                     |   | 4.5 |                                     |   | 4.4 |  |  |   | 4.5



|(a) | Excludes equity costs related to AFUDC that are included in Other Income and Expenses in the Consolidated Statements of Operations.
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|(1) | See Note 1 for additional information on Predecessor and Successor reporting.
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